#428DA1#428DA1

#428DA1 is a mid, moderate cyan. Relative luminance 0.228; OKLCH L 60.4% C 0.080 H 217.8°. Best body text is #000000 at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#428DA1
RGB	rgb(66, 141, 161)
HSL	hsl(193, 42%, 45%)
HSV	hsv(193, 59%, 63%)
CMYK	cmyk(59%, 12.4%, 0%, 36.9%)
CIE-LAB	lab(54.84, -17.16, -17.61)
CIE-LCH	lch(54.84, 24.59, 225.73°)
OKLab	oklab(60.39% -0.063 -0.0489)
OKLCH	oklch(60.39% 0.08 217.8)
XYZ	xyz(18.2021, 22.7794, 37.1489)
Luminance	0.2278 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DA1 #A15642

analogous

#42A186 #428DA1 #425DA1

triadic

#428DA1 #A1428D #8DA142

tetradic

#428DA1 #8642A1 #A15642 #5DA142

square

#428DA1 #8642A1 #A15642 #5DA142

split-complementary

#428DA1 #A1425D #A18642

monochromatic

#1E414A #306776 #428DA1 #62ABBF #8DC2D0

Accessibility & contrast

On white

3.78

#428DA1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.56

#428DA1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DA1

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DA1	#FFFFFF	#000000	##000000
##428DA1	1.00	3.78	5.56	5.56
#FFFFFF	3.78	1.00	21.00	21.00
#000000	5.56	21.00	1.00	1.00
##000000	5.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8089A2

Deuteranopia (green-blind)

#727FA1

Tritanopia (blue-blind)

#009493

Achromatopsia (no color)

#838383

Design tokens & code

CSS

--color: #428da1;
/* rgb */ color: rgb(66, 141, 161);
/* oklch */ color: oklch(60.4% 0.080 217.8);

Tailwind

colors: {
  custom: {
    50: '#7faebc',
    500: '#428da1',
    950: '#000000',
  },
}

SCSS

$custom: #428da1;
$custom-light: #7faebc;
$custom-dark: #000000;

JSON

{
  "hex": "#428da1",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 161
  },
  "hsl": {
    "h": 192.632,
    "s": 41.85,
    "l": 44.51
  },
  "oklch": {
    "l": 0.60392,
    "c": 0.07972,
    "h": 217.8
  },
  "luminance": 0.22781
}

Semantic roles & 50–950 ramp

primary

#428DA1

secondary

#BB8F83

accent

#7056D2

background

#F8FAFB

surface

#EFF4F6

border

#CACED0

text

#0B1012

muted

#7C7F81

Preview Lab

Preview with #428DA1

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →